<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello World</title>
</head>
<body>
<h2>Hello World</h2>
<a href="/ui/login">有账号，去登录</a><br>
<a href="/ui/register">没账号，去注册</a>
</body>
</html>